- Fitness; suitableness; appropriateness; as, the aptness of
things to their end. - Disposition of the mind; propensity; as, the aptness of
men to follow example. - Quickness of apprehension; readiness in learning;
docility; as, an aptness to learn is more observable in some children
than in others. - Proneness; tendency; as, the aptness of iron to rust.
Meaning of 'aptness' (Princeton's WordNet)
1 . aptness
[ n]
Meaning (1): - a disposition to behave in a certain way